release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-ixp23xx/roadrunner.c

   1 /*
   2  * arch/arm/mach-ixp23xx/roadrunner.c
   3  *
   4  * RoadRunner board-specific routines
   5  *
   6  * Author: Deepak Saxena <dsaxena@plexity.net>
   7  *
   8  * Copyright 2005 (c) MontaVista Software, Inc.
   9  *
  10  * Based on 2.4 code Copyright 2005 (c) ADI Engineering Corporation
  11  *
  12  * This file is licensed under the terms of the GNU General Public
  13  * License version 2. This program is licensed "as is" without any
  14  * warranty of any kind, whether express or implied.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/spinlock.h>
  20 #include <linux/sched.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/serial.h>
  23 #include <linux/tty.h>
  24 #include <linux/bitops.h>
  25 #include <linux/ioport.h>
  26 #include <linux/serial_8250.h>
  27 #include <linux/serial_core.h>
  28 #include <linux/device.h>
  29 #include <linux/mm.h>
  30 #include <linux/pci.h>
  31 #include <linux/mtd/physmap.h>
  32
  33 #include <asm/types.h>
  34 #include <asm/setup.h>
  35 #include <asm/memory.h>
  36 #include <mach/hardware.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/irq.h>
  39 #include <asm/system.h>
  40 #include <asm/tlbflush.h>
  41 #include <asm/pgtable.h>
  42
  43 #include <asm/mach/map.h>
  44 #include <asm/mach/irq.h>
  45 #include <asm/mach/arch.h>
  46 #include <asm/mach/pci.h>
  47
  48 /*
  49  * Interrupt mapping
  50  */
  51 #define INTA            IRQ_ROADRUNNER_PCI_INTA
  52 #define INTB            IRQ_ROADRUNNER_PCI_INTB
  53 #define INTC            IRQ_ROADRUNNER_PCI_INTC
  54 #define INTD            IRQ_ROADRUNNER_PCI_INTD
  55
  56 #define INTC_PIN        IXP23XX_GPIO_PIN_11
  57 #define INTD_PIN        IXP23XX_GPIO_PIN_12
  58
  59 static int __init roadrunner_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
  60 {
  61         static int pci_card_slot_irq[] = {INTB, INTC, INTD, INTA};
  62         static int pmc_card_slot_irq[] = {INTA, INTB, INTC, INTD};
  63         static int usb_irq[] = {INTB, INTC, INTD, -1};
  64         static int mini_pci_1_irq[] = {INTB, INTC, -1, -1};
  65         static int mini_pci_2_irq[] = {INTC, INTD, -1, -1};
  66
  67         switch(dev->bus->number) {
  68                 case 0:
  69                         switch(dev->devfn) {
  70                         case 0x0: // PCI-PCI bridge
  71                                 break;
  72                         case 0x8: // PCI Card Slot
  73                                 return pci_card_slot_irq[pin - 1];
  74                         case 0x10: // PMC Slot
  75                                 return pmc_card_slot_irq[pin - 1];
  76                         case 0x18: // PMC Slot Secondary Agent
  77                                 break;
  78                         case 0x20: // IXP Processor
  79                                 break;
  80                         default:
  81                                 return NO_IRQ;
  82                         }
  83                         break;
  84
  85                 case 1:
  86                         switch(dev->devfn) {
  87                         case 0x0: // IDE Controller
  88                                 return (pin == 1) ? INTC : -1;
  89                         case 0x8: // USB fun 0
  90                         case 0x9: // USB fun 1
  91                         case 0xa: // USB fun 2
  92                                 return usb_irq[pin - 1];
  93                         case 0x10: // Mini PCI 1
  94                                 return mini_pci_1_irq[pin-1];
  95                         case 0x18: // Mini PCI 2
  96                                 return mini_pci_2_irq[pin-1];
  97                         case 0x20: // MEM slot
  98                                 return (pin == 1) ? INTA : -1;
  99                         default:
 100                                 return NO_IRQ;
 101                         }
 102                         break;
 103
 104                 default:
 105                         return NO_IRQ;
 106         }
 107
 108         return NO_IRQ;
 109 }
 110
 111 static void __init roadrunner_pci_preinit(void)
 112 {
 113         set_irq_type(IRQ_ROADRUNNER_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
 114         set_irq_type(IRQ_ROADRUNNER_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
 115
 116         ixp23xx_pci_preinit();
 117 }
 118
 119 static struct hw_pci roadrunner_pci __initdata = {
 120         .nr_controllers = 1,
 121         .preinit        = roadrunner_pci_preinit,
 122         .setup          = ixp23xx_pci_setup,
 123         .scan           = ixp23xx_pci_scan_bus,
 124         .map_irq        = roadrunner_map_irq,
 125 };
 126
 127 static int __init roadrunner_pci_init(void)
 128 {
 129         if (machine_is_roadrunner())
 130                 pci_common_init(&roadrunner_pci);
 131
 132         return 0;
 133 };
 134
 135 subsys_initcall(roadrunner_pci_init);
 136
 137 static struct physmap_flash_data roadrunner_flash_data = {
 138         .width          = 2,
 139 };
 140
 141 static struct resource roadrunner_flash_resource = {
 142         .start          = 0x90000000,
 143         .end            = 0x93ffffff,
 144         .flags          = IORESOURCE_MEM,
 145 };
 146
 147 static struct platform_device roadrunner_flash = {
 148         .name           = "physmap-flash",
 149         .id             = 0,
 150         .dev            = {
 151                 .platform_data  = &roadrunner_flash_data,
 152         },
 153         .num_resources  = 1,
 154         .resource       = &roadrunner_flash_resource,
 155 };
 156
 157 static void __init roadrunner_init(void)
 158 {
 159         platform_device_register(&roadrunner_flash);
 160
 161         /*
 162          * Mark flash as writeable
 163          */
 164         IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
 165         IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
 166         IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
 167         IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
 168
 169         ixp23xx_sys_init();
 170 }
 171
 172 MACHINE_START(ROADRUNNER, "ADI Engineering RoadRunner Development Platform")
 173         /* Maintainer: Deepak Saxena */
 174         .phys_io        = IXP23XX_PERIPHERAL_PHYS,
 175         .io_pg_offst    = ((IXP23XX_PERIPHERAL_VIRT >> 18)) & 0xfffc,
 176         .map_io         = ixp23xx_map_io,
 177         .init_irq       = ixp23xx_init_irq,
 178         .timer          = &ixp23xx_timer,
 179         .boot_params    = 0x00000100,
 180         .init_machine   = roadrunner_init,
 181 MACHINE_END